Chuck.



PATENTED OCT. 10, 1905.

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B. M. W. HANsoN.

CHUCK.

APPLICATION PILED MAY 22. 1905.

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BENGT M. WV. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT &VHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.

CHUCK.

Specification of Letters Patent.

Patented oct. 1o, 1905.

Application filed May 22,1905, Serial No. 261,668.

To all whom it may concern.'

Be it known that I, YBevor M. W. HANsoN, (who have declared my intentionof becoming a citizen of the United States,) residing at Hartford, inthe county of Hartford and State of Connecticut, have invented certainnew and useful Improvements in Chucks, of which the following is aspecification.

This invention relates to chucks, and has for its object the provisionof a device of the class mentioned which will be of simple constructionand of great grasping power.

A further object of the invention is the provision of achuck having jawswith conical outer surfaces, a cone-sleeve fitted over said jaws,toggles or struts in engagement at their ends with the cone-sleeve andat their opposite ends with an adjustable abutment, and a sliding sleevefor actuating said struts.

A further object of the invention is the provision of a chuck composedof few parts and of compact and strong construction, as will behereinafter explained.

In the accompanying drawings, Figure 1 is an end view of the improvedchuck, and Fig. 2 is a longitudinal vertical section of the same.

Like numerals designate similar parts throughout both the views.

Referring to the drawings, the numeral 5 designates the spindle, whichis provided with a circumferential ange 6 and is externally threaded atits inner end, as at 7, to receive the chambered chuck-body 8, providedwith tool-recesses 9, in which a tool may be inserted for attaching itto and detaching it from the spindle, said chuck-body being rabbeted at10 to fit over the collar 6 and having a stop-flange 11. Slots 12 areformed at intervals in a forward extension 8 of the chuck-body, and saidextension is reduced and externally threaded at 82 for the reception ofa cap 13, having Spanner-recesses 13.

Designated by 14 are the jaws, each consisting of a segment having aconical periphery and each being rabbeted at its forward end at 14 toform a stop 142, which bears against the cap. Surrounding the conicalexterior surfaces of the chuck-jaws is a jawactuating sleeve 15, havinga conical interior surface to lit the corresponding surfaces of thejaws, and in the periphery of said sleeve is a series of seats 15 forthe reception of the rounded inner ends of struts or toggle-levers 16.These struts are of wedge shape, and the head of each is provided with astraight surface 16 on one edge and with a like surface 162 at itsthicker end, as shown in Fig. 2.

Designated by 17 is a sliding sleeve which is fitted over the chuck-bodyand is provided with an inclined inner surface 18, terminating in acylindrical surface 19 for engaging the like surfaces 16 of the strutsor toggles 16.

In the operation of the chuck power is applied to the sleeve 17, and assaid sleeve is moved rearward the surface 18 thereof will engage thestruts or toggles in the manner described, will force them toward astraight position, and will cause their inner ends to advance thejaw-actuating sleeve 15 and close the jaws upon the work. At the end ofits rearward movement the sleeve 17 engages the stop-flange 11, and thecylindrical surface 19 of said sleeve engages the like parts 16 of thestruts and locks them against receding movement, while the straightportion 162 bears against a like part 20 of the chuck-body, the twosurfaces acting as guides and preventing wabbling of said struts.

Changes may be made in the form and proportions of the various elementsof the chuck, the invention not being limited to the exact devices shownand described.

Having thus described my invention, what I claim is- 1. A chuckcomprising' a chambered body having slots at intervals in its periphery,toggles with rear bearing ends fitted in said slots, said ends providedwith straight surfaces disposed at an angle to each other; a slidingsleeve provided with conical and cylindrical surfaces for engaging therear bearing ends of the toggles; aslidablev jaw-actuating sleeve,conical interiorly, and provided with seats one for one end of eachtoggle; chuck-jaws having conical, exterior surfaces, and each having aflange; and a cap threaded upon the chuck body, and in engagement withthe flanges of the chuck-jaws.

2. A chuck comprising a body slotted at intervals in its periphery, andhaving straight walls at the inner ends of the slots; wedgeshapedtoggles having heads provided with IOO straight surfaces, a sleevehaving a conical itting in the rabbeted portions of the chuckandcylindrical surface for actuating said togjaws. IO gles; a jaw-engagingsleeveconical internally, In testimony whereof I afX my signature in andhaving seats one for one end of each togpresence of two Witnesses.

5 gle; chuck-jaws, conical exteriorly, and en- BENGT M. W. HANSON.

gagecl by said jaw-engaging sleeve,each chuck- Witnesses: jawhavngarabbeted portion at its outer end; KATH. T. M. OCONNELL,

and a cap threaded upon the chuck-body, and HENnY L. HUNTINGTON.

